Performing C SOURCE FILE Test CMAKE_HAVE_LIBC_PTHREAD failed with the following output:
Change Dir: /var/tmp/portage/net-wireless/srslte-20.10.1-r1/work/srslte-20.10.1_build/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/ninja cmTC_49b66 && [1/2] Building C object CMakeFiles/cmTC_49b66.dir/src.c.o
[2/2] Linking C executable cmTC_49b66
FAILED: cmTC_49b66 
: && /usr/bin/x86_64-pc-linux-gnu-gcc -O2 -pipe -march=native -fno-diagnostics-color  -falign-functions=32:25:16 -Wl,-O1 -Wl,--as-needed -Wl,--defsym=__gentoo_check_ldflags__=0   -rdynamic CMakeFiles/cmTC_49b66.dir/src.c.o -o cmTC_49b66   && :
/usr/lib/gcc/x86_64-pc-linux-gnu/10.2.0/../../../../x86_64-pc-linux-gnu/bin/ld: CMakeFiles/cmTC_49b66.dir/src.c.o: in function `main':
src.c:(.text.startup+0x25): undefined reference to `pthread_create'
/usr/lib/gcc/x86_64-pc-linux-gnu/10.2.0/../../../../x86_64-pc-linux-gnu/bin/ld: src.c:(.text.startup+0x2e): undefined reference to `pthread_detach'
/usr/lib/gcc/x86_64-pc-linux-gnu/10.2.0/../../../../x86_64-pc-linux-gnu/bin/ld: src.c:(.text.startup+0x37): undefined reference to `pthread_cancel'
/usr/lib/gcc/x86_64-pc-linux-gnu/10.2.0/../../../../x86_64-pc-linux-gnu/bin/ld: src.c:(.text.startup+0x42): undefined reference to `pthread_join'
collect2: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.


Source file was:
#include <pthread.h>

static void* test_func(void* data)
{
  return data;
}

int main(void)
{
  pthread_t thread;
  pthread_create(&thread, NULL, test_func, NULL);
  pthread_detach(thread);
  pthread_cancel(thread);
  pthread_join(thread, NULL);
  pthread_atfork(NULL, NULL, NULL);
  pthread_exit(NULL);

  return 0;
}

Determining if the function pthread_create exists in the pthreads failed with the following output:
Change Dir: /var/tmp/portage/net-wireless/srslte-20.10.1-r1/work/srslte-20.10.1_build/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/ninja cmTC_b1900 && [1/2] Building C object CMakeFiles/cmTC_b1900.dir/CheckFunctionExists.c.o
[2/2] Linking C executable cmTC_b1900
FAILED: cmTC_b1900 
: && /usr/bin/x86_64-pc-linux-gnu-gcc -O2 -pipe -march=native -fno-diagnostics-color  -falign-functions=32:25:16 -DCHECK_FUNCTION_EXISTS=pthread_create -Wl,-O1 -Wl,--as-needed -Wl,--defsym=__gentoo_check_ldflags__=0   -rdynamic CMakeFiles/cmTC_b1900.dir/CheckFunctionExists.c.o -o cmTC_b1900  -lpthreads && :
/usr/lib/gcc/x86_64-pc-linux-gnu/10.2.0/../../../../x86_64-pc-linux-gnu/bin/ld: cannot find -lpthreads
collect2: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.



Performing C SOURCE FILE Test HAVE_AVX512 failed with the following output:
Change Dir: /var/tmp/portage/net-wireless/srslte-20.10.1-r1/work/srslte-20.10.1_build/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/ninja cmTC_cda78 && [1/2] Building C object CMakeFiles/cmTC_cda78.dir/src.c.o
[2/2] Linking C executable cmTC_cda78


Return value: FAILED_TO_RUN
Source file was:

          #include <immintrin.h>
          int main()
          {
            __m512i a, b, c;
            const int src[16] = { 0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8 , 0x9, 0xA, 0xB, 0xC, 0xD, 0xE, 0xF};
            int dst[16];
            a =  _mm512_loadu_si512( (__m512i*)src );
            b =  _mm512_loadu_si512( (__m512i*)src );
            c = _mm512_add_epi32( a, b );
            _mm512_storeu_si512( (__m512i*)dst, c );
            int i = 0;
            for( i = 0; i < 16; i++ ){
              if( ( src[i] + src[i] ) != dst[i] ){
                return -1;
              }
            }
            return 0;
          }